The FERMAX 3390 VDS Basic Loft Telephone allows communication from the home with the panel located in the street with four wires + neutral, as well as incorporating a button for opening the door. It is made of high quality ABS, with a textured finish to facilitate cleaning and greater resistance to light. The VDS system is a revolutionary technology that allows the transmission of video and audio using a code generated by the VDS amplifier, so it does not require the use of video cables for each home. It only requires the installation of a 5-wire UTP cable or 3 wires + coaxial (video). It allows to manage up to 199 homes with 2 accesses and a guard unit. The VDS amplifier incorporates a voice synthesizer that is activated when the door is opened, emitting a "Door open, close after entry" signal. *For more information consult the FERMAX website